Extech 40180 Tone Generator and Amplifier Probe Kit - Telephone Line Tester, Wire Tracer & Circuit Finder with Alligator Clips for Cable Continuity, Tone Detection & Installation Testing

Q: Do you have to use the transmitter or can it locate passive cables behind a wall without it?

You can locate 60Hz lines behind a wall to some extent, without the transmitter: The probe will make a louder 120Hz buzzing noise as it is moved closer to cables.

Q: If I have both ends of a house wire exposed, how would I hook up to check if I have the correct wire?

You connect the transmitter to a pair of wires in the room, either raw ends or in an RJ11 telephone jack. Turn it on. Turn on the probe and check that the toner is working. Go go to NID, where all the house wiring starts. The tone can be hear is you are near the wire, louder on the outside of the cable, very loud when actually touch the correct pair of wires.

Q: Is it easy for a beginner to use? Does it easily hook up to the wire or do I need to cut into the plastic surrounding the wire?

It's easy to connect and you don't need to cut into the insulator, but the problem I had with the tool is: the signal is so sensitive that I wasn't able to tell if the wire was cut, because all the wires I was testing were in a harness

Q: How many feet will this work for?

i was using it very successfully at over 70 feet. The lines I was tracing were up and over in a building. So i really do not know the exact distance. but it worked great

Product ID: 2175290

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Details

Brand
Extech
Power Source
Corded
Style
40180
Color
Black
Item Weight
0.28 Kilograms

📏Measurement Accuracy ±0.5%

🔋9V Alkaline Battery Included

🔌RJ11 & RJ45 Connectors + Alligator Clips

Description

🎯 Master your cables with pinpoint accuracy and zero guesswork!

SAFE SOUND TESTING - Non-contact inductive probe tip prevents shorts while delivering clear audible tones.
POWER THROUGH YOUR DAY - Includes a 9V alkaline battery to keep your kit ready whenever you are—no downtime.
VERSATILE CONNECTIVITY - RJ11, RJ45, and alligator clips cover phone, network, and coax cables in one kit.
PINPOINT WITH PRECISION - Trace wires and cables effortlessly with ±0.5% accuracy for flawless diagnostics.
COMPACT HEAVY DUTY DESIGN - Lightweight yet rugged 9 x 2.3 x 1 inch form factor built for the professional bench.

The Extech 40180 Tone Generator and Amplifier Probe Kit is a professional-grade wire tracer designed for precise cable identification and testing. Featuring a non-contact inductive probe, it supports phone, network, and coax cables with RJ11, RJ45 connectors, and alligator clips. Powered by an included 9V alkaline battery, it offers ±0.5% measurement accuracy and a rugged, compact design ideal for benchtop use and field diagnostics.

Specifications

Brand	Extech
Power Source	Corded Electric
Style	40180
Color	Black
Item Weight	0.28 Kilograms
Item dimensions L x W x H	9 x 2.3 x 1 inches
Specification Met	CE
Measurement Type	LCR Meter
UPC	785533808377 793950401804
Manufacturer	Extech
Global Trade Identification Number	00793950401804
Part Number	40180
Item Weight	9.9 ounces
Product Dimensions	9 x 2.3 x 1 inches
Item model number	40180
Batteries	1 Product Specific batteries required. (included)
Is Discontinued By Manufacturer	No
Size	Heavy Duty Wire Tracer
Voltage	9 Volts
Item Package Quantity	1
Number Of Pieces	1
Measurement Accuracy	+/-0.5%
Included Components	Alligator clips, RJ45 and RJ11 modular connectors, 9V battery, Case
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
Description Pile	9V Battery
Warranty Description	1 year